快速而肮脏：
public class XmlSplit { public static void main(String [] args) throws Exception { File input = new File("input.xml"); documentBuilderFactory dbf = documentBuilderFactory.newInstance(); document doc = dbf.newdocumentBuilder().parse(input); XPath xpath = XPathFactory.newInstance().newXPath(); NodeList nodes = (NodeList) xpath.evaluate("//T0020/IRP_ACCOUNT", doc, XPathConstants.NODESET); int itemsPerFile = 5; int fileNumber = 0; document currentDoc = dbf.newdocumentBuilder().newdocument(); Node rootNode = currentDoc.createElement("T0020"); File currentFile = new File(fileNumber+".xml"); for (int i=1; i <= nodes.getLength(); i++) { Node imported = currentDoc.importNode(nodes.item(i-1), true); rootNode.appendChild(imported); if (i % itemsPerFile == 0) { writeToFile(rootNode, currentFile); rootNode = currentDoc.createElement("T0020"); currentFile = new File((++fileNumber)+".xml"); } } writeToFile(rootNode, currentFile); } private static void writeToFile(Node node, File file) throws Exception { Transformer transformer = TransformerFactory.newInstance().newTransformer(); transformer.transform(new DOMSource(node), new StreamResult(new FileWriter(file))); }}
